An impressive arc shaped
rim of HII structure is located in the tail of the Scorpius constellation and
known as the Prawn Nebula. The center portion of the nebula is very bright and
it seems there is a faint reflection component embedding it. Bright stars are
part of Open Cluster named Trumpler 24 which shines at magnitude 8.6 and spans
over 60 arc minutes representing approximately 250 light years across.